#include "Date.h"

Date::Date(int year, int month, int day)
{
	_year = year;
	_month = month;
	_day = day;
}


void Date::Print()
{
	cout << _year << "/" << _month << "/" << _day << endl;
}

//Date::Date(Date& d)
//{
//	_year = d._year;
//	_month = d._month;
//	_day = d._day;
//}

Date& Date::operator+=(int day) 
{
	_day += day;
	while (_day > GetmonthDay(_year, _month))
	{
		_day -= GetmonthDay(_year, _month);
		_month++;
		if (_month == 13)
		{
			_year++;
			_month = 1;
		}
	}
	return *this;
}

//Date Date::operator+(int day)
//{
//	Date tmp = *this;
//	tmp += day;
//	while (tmp._day > GetmonthDay(tmp._year, tmp._month))
//	{
//		tmp._day -= GetmonthDay(tmp._year, tmp._month);
//		tmp._month++;
//		if (tmp._month == 13)
//		{
//			tmp._year++;
//			tmp._month = 1;
//		}
//	}
//	return tmp;
//}

Date Date::operator+(int day)
{
	Date tmp = *this;
	tmp += day;
	return tmp;
}

Date& Date::operator-=(int day)
{
	_day -= day;
	while (_day <= 0)
	{
		_month--;
		if (_month == 0)
		{
			_year--;
			_month = 12;
		}
		_day += GetmonthDay(_year, _month);
	}
	return *this;
}

//Date Date::operator-(int day)
//{
//	Date tmp = *this;
//	tmp -= day;
//	while (tmp._day <= 0)
//	{
//		tmp._month--;
//		if (tmp._month == 0)
//		{
//			tmp._year--;
//			tmp._month = 12;
//		}
//		tmp._day += GetmonthDay(tmp._year, tmp._month);
//	}
//	return tmp;
//}

Date Date::operator-(int day)
{
	Date tmp = *this;
	*this -= day;
	return tmp;
}

bool Date::operator<(const Date& d)
{
	if (_year < d._year)
		return true;
	else if (_year == d._year && _month < d._month)
		return true;
	else if (_year == d._year && _month == d._month)
		return _day < d._day;
	return false;
}

bool Date::operator>(const Date& d)
{
	if (_year > d._year)
		return true;
	else if (_year == d._year && _month > d._month)
		return true;
	else if (_year == d._year && _month == d._month)
		return _day > d._day;
	return false;
}


bool Date::operator<=(const Date& d)
{
	return !(*this > d);
}

bool Date::operator>=(const Date& d)
{
	return !(*this < d);
}

bool Date::operator==(const Date& d)
{
	if (_year == d._year
		&& _month == d._month
		&& _day == d._day)
	{
		return true;
	}
	return false;
}

bool Date::operator!=(const Date& d)
{
	return !(*this == d);
}

int Date::operator-(const Date& d)
{
	int count = 0;
	Date max = *this;
 	Date min = d;
	if (*this < d)
	{
		max = d;
		min = *this;
	}
	while (max != min)
	{
		min+=1;
		count++;
	}
	return count;
}

Date& Date::operator++()
{
	*this += 1;
	return *this;
}

Date& Date::operator++(int)
{
	Date tmp = *this;
	*this += 1;
	return tmp;
}

Date& Date::operator--()
{
	*this -= 1;
	return *this;
}

Date& Date::operator--(int)
{
	Date tmp = *this;
	*this -= 1;
	return tmp;
}

ostream& operator<<(ostream& out, const Date& d)
{
	out << d._year << "/" << d._month << "/" << d._day << endl;
	return out;
}

istream& operator>>(istream& in, Date& d)
{
	in >> d._year >> d._month >> d._day;
	return in;
}

//Date& Date::operator=(Date& d)
//{
//	_year = d._year;
//	_month = d._month;
//	_day = d._day;
//	return *this;
//}

